Answer:
NO.3) Mass of Al2O3 formed = 229.5g
Answer:
Chemistry is the branch of science that deals with the identification of the substances of which matter is composed; the investigation of their properties and the ways in which they interact, combine, and change; and the use of these processes to form new substances.
They answer questions like, like "What makes up this material?," "How does this material change when heated or cooled,?" What happens when I mix this material with another material,?" and "What rules determine how materials change in different situations?" What makes up Chemical X?
T₁=84 d
t₂=14 d
m₁=4 g
n=t₁/t₂
n=84/14=6
m₂=m₁/2ⁿ
m₂=4/(2⁶)=0.0625 g
0.0625 grams will remain after 84.0 days
Answer:
188 s
Explanation:
We are told the reaction is second order respect to A so we know the expression for the rate law is
rate = - Δ[A]/Δt = k[A]²
where the symbol Δ stands for change, [A] is the concentration of A, and k is the rate constant.
The integrated rate law for this equation from calculus is
1 / [A]t = kt + 1/[A]₀
where [A]t is the concentration of A at time t, k is the rate constant, and [A]₀ is the initial concentration.
Since we have all the information required to solve this equation lets plug our values
1 / 0.280= 0.0130x t + 1 / 0.890
( 1 / 0.280 - 1 / 0.890)M⁻¹ = 0.0130 M⁻¹ ·s⁻¹t
t = 188 s